281396664140 has 24 divisors (see below), whose sum is σ = 590993504640. Its totient is φ = 112547139968.

The previous prime is 281396664083. The next prime is 281396664161. The reversal of 281396664140 is 41466693182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518780 + ... + 912099.

It is an arithmetic number, because the mean of its divisors is an integer number (24624729360).

Almost surely, 2^281396664140 is an apocalyptic number.

281396664140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281396664140 is an abundant number, since it is smaller than the sum of its proper divisors (309596840500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281396664140 is a wasteful number, since it uses less digits than its factorization.

281396664140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440721 (or 1440719 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 281396664140 in words is "two hundred eighty-one billion, three hundred ninety-six million, six hundred sixty-four thousand, one hundred forty".